The carbon paper was improved to be fit for the use of gas diffusion layer in proton exchange membrane fuel cell by the process of impregnation, molding, carbonizating, graphitization, with modified phenolic resin as the binder and carbon fiber paper as the green body. Fundamental properties were characterized and compared with Toray carbon paper. The results show that, thickness is 0. 189mm, density 0. 446g/cm3 ,which are almost the same with Toray's;the porosity is 83%, 18. 6% higher than Toray's; through-plane resistivity 3. 35 mΩ · cm and in-plane resistivity 3. 86mΩ·cm, 25. 9％ and 39. 7％ lower than Toray carbon paper respectly; permeability rate reaches 5100mL·mm/(cm2 · h · mmAq) at 88. 2Pa,41.67% higher than Toray's;the output voltage performance is a little worse than Toray's but not soevident.%以改性酚醛树脂为粘合剂,炭纤维纸为坯体,通过浸渍、模压固化、炭化、石墨化工艺制得质子交换膜燃料电池气体扩散层用炭纸,表征了炭纸的基本性能并与东丽炭纸的相关性能进行了对比.结果表明,自制炭纸的厚度为0.189mm,密度为0.446g/cm3,均与东丽炭纸相近;孔隙率为83%,比东丽炭纸提高18.6%;体电阻率为3.35mΩ·cm,面电阻率为3.86mΩ·cm,分别比东丽炭纸减小了25.9%和39.7%;压差为88.2Pa时透气率达5100mL·mm/(cm2·h·mmAq),比东丽炭纸提高了41.67%;抗拉强度为29.98MPa,比东丽炭纸提高约16.5%;与东丽炭纸相比,自制炭纸的电压输出性能略有下降但不明显.
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